The Saudi-led coalition launched a major assault on Yemen's port city of Hodeidah on June 13, 2018, killing 250 Iranian-backed Houthi fighters, according to UPI.

The coalition's initial assault on Hodeidah, which the UN has warned could end up killing 250,000 civilians and exacerbate the already terrible humanitarian condition, included several airstrikes and also led to the capture of 140 Houthi fighters, UPI reported.

The Houthis at the same time reportedly hit a coalition warship with two missiles, according to Jane's 360. The Saudis and the United Arab Emirates — the two major actors in the coalition — have not commented on the claim.

Almasirah Live, a Houthi media outlet, has broadcasted purported footage of the coalition ship on fire:

The coalition warship was trying to land military equipment and troops on the port city when it was hit, Jane's 360 reported.

There were even a few scant claims that US military advisers were on board the coalition warship when it was hit, but Pentagon Spokesman Major Adrian Rankine-Galloway told Business Insider that there are no US military advisers on the ground.

The US marginally backs the Saudi-led coalition, announcing that it's helping show the coalition which targets not to hit in order to limit civilian casualties.

The US also helps the Saudi-led coalition in Yemen with "limited intelligence sharing," aerial refueling for coalition jets, and training to make coalition airstrikes more precise, Rankine-Galloway previously told Business Insider.

US Secretary of State Mike Pompeo on June 13, 2018, urged both sides to reach a diplomatic solution and allow humanitarian aid into Hodeidah, which has been closed because of the assault, UPI reported.

The conflict in Yemen has already been described as one of the worst humanitarian disasters in the world, with at least eight million people on the brink of starvation due to famine, and one million children infected with cholera.

This article originally appeared on Business Insider. Follow @BusinessInsider on Twitter.